Hello newbie here with a problem.

[prezly]

After a lifetime of aircooled I have just bought a 2001 1.6 s estate but I'm not sure what Mk it is so apologies if this is in the wrong section.The main problem I'm having is the car is over revving.Sat at lights the engine can rev at 2000 rpm but can drop if I press the accelerator a few times,but my main concern is if I want to slow down by easing off the accelerator and nothing happens,it also makes changing gear a bit jerky.The cat has been cut and re-welded and there is a loud rattle coming from it and it sounds like it is blowing slightly,the warning light for this is also on.Any ideas what is causing the high revs,could it have anything to do with the cat.Thanks.

[alexperkins]

I would clean the throttle body out with Wynns fuel intake and carb cleaner and check the condition of the throttle cable.

As for the cat, you are best to replace it - youll never get good results from cutting and rewelding it. Certainly not on a 1.6 NA